我是Python的初学者,尤其是Matplotlib。我有一个22797x3数组,它是通过两个其他数组(一个22797x400长,另一个400x3长)之间的乘法构建的。在结果数组(22797x3)中,每行代表一个具有(x,y,z)坐标的点,因此为3列。我如何在3D曲面上绘制结果数组,在那里我可以看到所有22797点在3D空间中的分布?这些数据用于将来的Kmeans聚类,因此我需要对其进行可视化。
到目前为止,我已经尝试过:
import numpy as np
from matplotlib import pyplot as plt
from mpl_toolkits.mplot3d import Axes3D
#building the 22797x3 array:
#loading the first array from .txt file, 22797x400 long.
array = np.loadtxt('C:\Users\Scripts/final_array.txt', usecols=range(400))
array = np.float32(array)
#loading the second array from .txt file, 400x3 long.
small_vh2 = np.loadtxt('C:\Users\Scripts/small_vh2.txt', usecols=range(3))
small_vh2 = np.float32(small_vh2)
#multiplying and getting result array 22797x3 long:
Y = np.array(np.matmul(array,small_vh2))
#I've checked Y dimensions, it's 22797x3 long, working fine.
#now I must plot it in 3D:
fig = plt.figure()
ax = Axes3D(fig)
ax.scatter(Y[:, 0], Y[:, 1], Y[:, 2])
plt.show()
我一直得到如下图所示的结果:
https://i.stack.imgur.com/jRyHM.jpg
我需要得到的是22797点,而我一直仅得到仅绘制4个点。有人知道代码有什么问题吗?
答案 0 :(得分:0)
from mpl_toolkits.mplot3d import Axes3D
import numpy as np
from matplotlib import pyplot as plt
# made 2 random arrays of the same size as yours
array = np.random.rand(22797, 400)
small_vh2 = np.random.rand(400,3)
Y = np.matmul(array,small_vh2)
#now I must plot it in 3D:
fig = plt.figure()
ax = fig.add_subplot(111, projection='3d')
ax.scatter(Y[:, 0], Y[:, 1], Y[:, 2], alpha = 0.1)
ax.set_xlabel('X Label')
ax.set_ylabel('Y Label')
ax.set_zlabel('Z Label')
plt.show()